213212242 has 16 divisors (see below), whose sum is σ = 324113400. Its totient is φ = 105183232.

The previous prime is 213212179. The next prime is 213212261. The reversal of 213212242 is 242212312.

213212242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59923081 + 153289161 = 7741^2 + 12381^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50634 + ... + 54682.

Almost surely, 2^213212242 is an apocalyptic number.

213212242 is a deficient number, since it is larger than the sum of its proper divisors (110901158).

213212242 is a wasteful number, since it uses less digits than its factorization.

213212242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397.

The product of its digits is 384, while the sum is 19.

The square root of 213212242 is about 14601.7889999822. The cubic root of 213212242 is about 597.4075574613.

Adding to 213212242 its reverse (242212312), we get a palindrome (455424554).

The spelling of 213212242 in words is "two hundred thirteen million, two hundred twelve thousand, two hundred forty-two".